Check Point Advisories

Digium Asterisk RTP Stack Information Disclosure (CVE-2017-14099)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0810
Date Published:	28 Sep 2017
Severity:	Medium
Last Updated:	Monday 23 October, 2017
Source:	Digium
Industry Reference:	CVE-2017-14099
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Digium Asterisk Open Source prior to 11.25.2 Digium Asterisk Open Source prior to 13.17.1 Digium Asterisk Open Source prior to 14.6.1 Digium Certified Asterisk prior to 11.6-cert17 Digium Certified Asterisk prior to 13.13-cert5
Vulnerability Description	An information disclosure vulnerability exists in Digium Asterisk. The vulnerability is due to improper handling of incoming RTP/RTCP packets when the chan_sip and chan_pjsip channel drivers are configured to use NAT and Symmetric-RTP respectively.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Digium Asterisk RTP Stack Information Disclosure protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: VoIP Enforcement Violation.
Attack Information: Digium Asterisk RTP Stack Information Disclosure